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(No Model.) 2 Sheets-Sheet 1.

G. SINCLAIR.

FUEL FEEDING DEVIGE.

No. 288,505. Patented Nov. 13, 1883.

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(No Model.) 2 SheetQ-Sheet 2.

G. SINCLAIR.

EUEL FEEDING 'DEVIGE.

No. 288,505. 4 Patented Nov. 13; 1883.

g 55 3555533359559352 iw wfi UNITED STATES PAT NT ()FFIcE.

GEORGE SINCLAIR, OF LEITH, COUNTY OF MID-LO'IHIAN, SCOTLAND.

FUEL-FEEDING DEVICE.

SPECIFICATION forming part of Letters Patent No. 288,505, dated November13, 1883.

Application filed December 26, 1882. (No model.) Patented in England May19, 1877, No. 2,035, and August 10, 1889., No. 3,808; in France August21, l882, No. 138,505; in Belgium August 22, 1882, No. 58,832, and inGermany Augustl), 1882, No. 1,629.

To aZZ whom it may concern:

Be it known that I, GEORGE SINCLAIR, residing at Leith, in the county oflVIid-Lothian, Scotland, have invented certain new and usefulImprovements in Fuel-Feeding Devices, (for which I have obtained thefollowing patents: British, dated May 19, 1877, No. 2, 035 British,dated August 10, 1882, No. 3,808; French, dated August 21, 1882, No.138,505; Belgic, dated August 22, 1882, No. 58,832; and German, datedAugust 22, 1882, No. S 1,629 V,) of which the following is aspecification.

My said invention has for its object to simplify and otherwise improvethe construction of afuel-feeding device, in order to render the samemore efficient and suitable for different kinds of coal.

I11 the accompanying drawings, Figures 1 and 2 are a longitudinalvertical section and an end elevation of a horizontal cylindricalsteam-boiler constructed with -two internal furnaces, and Figs. 3, 4,and 5 are different Views of a compound fire-bar I prefer to use. Eachcompound fire-bar 6 consists of three pieces, (shown combined and inplanin Fig. 3,) there being two side pieces, 6, having straight outer sidesand a middle piece, 7, which is made with lateral inclined projections.Fig. 4 is a side view of the middle piece, 7 5 and Fig. 5 is a side viewof the outer side of one of the side pieces, 6; The inner sides of thepieces 6 are made counterparts of the sides of the middle piece, 7, butso that when the pieces are combined there is a narrow space for thepassage upward of air between the middle piece, 7, and theside pieces,6. My improved compound bar has no external lateral projections whichmight interfere with the different longitudinal movements of adjacentcompound bars, while at the same time I each compound bar has within itopenings of a zigzag or analogous form, which are believed to be bestfor the passage of air to the fuel. A double-incline projection, 8, isformed on the under side of the fire-bars, near their inner ends, forthepurpose of makingithem rise and fall a little when their longitudinalmovements cause the projection 8 to ride over their inner transversebearer, 9. Immediately behind the inner transverse bearer, 9, there is atransverse ,water-casing, 10, communicating with the boiler at the twosides of the furnace, and the'fire-bridge 11 is placed at some distancefarther back, leaving a space, 12, into which the more or less consumedfuel descends as it gradually passes beyond the inner end of thefire-bars 6, in consequence of their reciprocating action, combined withthe continual addition of fresh fuel at the front or outer end of thefurnace. The front ends ofthe fire-bars 6 are supported by and move upona transverse bearer, 13, the height of which is adjustable by means ofscrews in the brackets 14, by which it is held. The reciprocating motionis imparted to the fire-bars 6 by con necting-rods 15, jointed to thebars at their inner ends, and at their outer ends jointed upon cranks onashaft, 16, carried by standardbearings 17, and driven bymeans of aspurwheel and pinion, 18, from afirst-motion shaft, 19, having on it apulley, 20, for a drivingbelt, and provided with an engaging anddisengaging clutch Just above the space that the front ends of thefire-bars work through there is fixed an open frame, 21, havingimmediately above it a plate, 22, on which there is a movable pusher,23, and this pusher is connected by a pair of adjustable rods, 24, toupright pieces 25, fixed or formed on two of the fire-barconnecting-rods 15. The rods 24 are connected to the pusher 23 by aloose connection, so as to allow for the slight angular movement of thesaid rods. The outer ends of the pusher-rods 24 are also connected tothe rods 15 by inclined links 26, and in consequence of theseconnections the pusher 23 moves backward and forward as the crank shaft16 rotates. The hopper 27 in which the coal is put, is made withinclined sides and front, and is fixed directly over the plate 22 andpusher 23, its bottom being open toward the interior of the furnace, andthe coals fall from it down upon the plate 22, and are gradually pushedinto the furnace by the reciprocating action of the pusher 23. In eachhopper 27 there is fixed an iron box, 28, made with a pointed top, tocause the coals to be divided toward each side of it as they descend.

This boX 28 is open at its lower inner end, and at its front part it isclosed by a movable plate having perforations through which the firemancan see the condition of the fire, while, should it ever be necessary,he can remove the perforated plate and introduce a rod or poker. 7 Atthe inner side of the open frame 21, which is between the bottom plate,22, of the hopper and the fire-bars, there is fixed a frame, 29, holdingfire-bricks 30, which project into the furnace, and which are made withholes through them, or with channels along their sides, to form passagesfor the entrance of air. The inner ends of the fire-bricks 30 becomeintensely hot, and the air entering through them is heated and acts inan improved manner in promoting combustion, and in preventing theformation of clinker or the agglomeration of certain kinds of coal. If,with any coals,more air is required than what passes through thefire-bricks 30, the front transverse bearer, 13, of the, firebars 6 maybe lowered a little, to allow air to enter under the firebricks 30. I

I do not desire to claim in this case the particular construction ofcompound fire-bars above described, as that may form the subject of aseparate application.

I amawarethat mechanical stokers have heretoforebeen constructed withreciprocating fire-bars and reciprocating pushers in connection withfuel-hoppers and operating devices. This construction I do not wish toclaim, broadly; but

I claim as my invention- 1. The combination of the hopper ofafuelfeeding device, a reciprocating pusher, 23, and fire-bars below thesame,with the intermediate frame, 21, frame 29, and fire-bricks 30,having holes or channels through them, substantially as set forth.

2. The combination of feed-hopper, pusher 23, and reciprocatingfire-bars,with crank-shaft 16 and rods 15, 24, and 26, and uprights 25,substantially as described.

3. The combination of the hopper and pusher, with frame 21, fire-bars 6,and vertically-adjustable bearer 13, as set forth.

In testimony whereof Ihave signed my name to this specification in thepresence of two subscribing witnesses.

. GEORGE SINCLAIR.

Witnesses: I

D. GREIG, IV. D. KELDIE.

